US20100214258A1 - Portable electronic device and method for avoiding erroneous touch on touch panel thereof - Google Patents
Portable electronic device and method for avoiding erroneous touch on touch panel thereof Download PDFInfo
- Publication number
- US20100214258A1 US20100214258A1 US12/626,626 US62662609A US2010214258A1 US 20100214258 A1 US20100214258 A1 US 20100214258A1 US 62662609 A US62662609 A US 62662609A US 2010214258 A1 US2010214258 A1 US 2010214258A1
- Authority
- US
- United States
- Prior art keywords
- touch
- electronic device
- portable electronic
- touch pressure
- predetermined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
Definitions
- the present invention relates to a portable electronic device and a related method for avoiding erroneous touches on its touch panel, and more particularly, to a portable electronic device and a related method for adjusting a predetermined touch pressure threshold of the touch panel by detecting a distance between the portable electronic device and an object.
- touch panels have been broadly applied to these products as a data communication interface.
- the users may erroneously touch the touch panel since their faces are too close to the touch panel when making or answering a phone call, which often persecutes the users.
- the mobile phone is equipped with a capacity of determining when the users do want to perform the touch functions and when the users do not want to perform the touch functions, the problems of persecuting the users caused by erroneous touches can be reduced and thereby bring the users more convenience.
- the present disclosure provides a method for avoiding an erroneous touch on a touch panel in a portable electronic device.
- the method includes the steps of determining whether a triggering event is received; enabling a sensor when the triggering event is received; detecting a distance between the portable electronic device and an object by the sensor; and determining the predetermined touch pressure threshold of the touch panel according to the detected distance between the portable electronic device and the object.
- the predetermined touch pressure threshold is adjusted to a first threshold when the detected distance between the portable electronic device and the object is not smaller than the predetermined distance; and the predetermined touch pressure threshold is adjusted to a second threshold when the detected distance between the portable electronic device and the object is smaller than the predetermined distance.
- the portable electronic device is enabled to operate in a first mode and the predetermined touch pressure threshold is not adjusted when the detected distance between the portable electronic device and the object is not smaller than the predetermined distance; and the portable electronic device is enabled to operate in a second mode and the predetermined touch pressure threshold is adjusted to a second threshold when the detected distance between the portable electronic device and the object is smaller than the predetermined distance.
- the present disclosure provides a portable electronic device.
- the portable electronic device comprises a touch panel, a sensor, a triggering event determining module, and a touch pressure threshold setting module.
- the touch panel has a predetermined touch pressure threshold.
- the sensor detects a distance between the portable electronic device and an object.
- the triggering event determining module determines whether a triggering event is received, and enables the sensor when the triggering event is received.
- the touch pressure threshold setting module determines the predetermined touch pressure threshold of the touch panel according to the distance detected by the sensor.
- FIG. 1 is a diagram of a portable electronic device according to an embodiment of the present invention.
- FIG. 2 is a diagram showing an example of the touch panel shown in FIG. 1 .
- FIG. 3 (including 3 A, 3 B, 3 C, and 3 D) is an equivalent-circuit diagram illustrating how to measure a position and a contact resistance corresponding to a touch on a touch panel.
- FIG. 4 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according an exemplary embodiment of the present invention.
- FIG. 5 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according another exemplary embodiment of the present invention.
- FIG. 1 is a diagram of a portable electronic device 100 according to an embodiment of the present invention.
- the portable electronic device 100 includes, but is not limited to, a triggering event determining module 110 , a sensor 120 , a touch pressure threshold setting module 130 , a touch panel 140 , a touch pressure measuring module 150 , a touch pressure determining module 160 , and a control module 170 .
- the touch panel 140 has a predetermined touch pressure threshold TP_TH.
- the triggering event determining module 110 is configured to determine whether a triggering event TE is received and transmit a start signal SS to enable the sensor 120 when the triggering event TE is received.
- the sensor 120 is configured to detect a distance D between the portable electronic device 100 and an object, here the so-called object can be face, ear or any object approaching the portable electronic device 100 .
- the sensor 120 can be any sensor capable of detecting the distance between the portable electronic device 100 and an object or detecting whether the portable electronic device 100 approaches an object, e.g. a proximity sensor or an ultrasonic distance sensor.
- the touch pressure threshold setting module 130 is configured to determine the predetermined touch pressure threshold TP_TH of the touch panel 140 according to the distance D between the portable electronic device 100 and the object detected by the sensor 120 .
- the touch pressure measuring module 150 is configured to measure a touch pressure value TP_M corresponding to a touch TU 1 .
- the touch pressure determining module 160 is configured to determine whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold TP_TH to generate a determination result DR 1 .
- the control module 170 is configured to determine whether to perform a touch function corresponding to the touch TU 1 according to the determination result DR 1 .
- the portable electronic device 100 can be a mobile phone or a PDA. But this should not be considered as limitations of the present invention, the portable electronic device 100 can be a mobile device of other types.
- the triggering event TE can comprise a phone call or a wake-up notice, but the present invention is not limited to this only and can be other triggering events.
- the mechanism and the method disclosed in the present invention determines the predetermined touch pressure threshold TP_TH of the touch panel 140 based on the distance D, which is detected by the sensor 120 , between the portable electronic device 100 and the object.
- the sensor 120 can be utilized for determining whether the distance D between the portable electronic device 100 and the object is smaller than a predetermined distance D 1 .
- the portable electronic device 100 When the distance D between the portable electronic device 100 and the object is not smaller than the predetermined distance D 1 , it is judged that the user did not put the portable electronic device 100 near the ear and the portable electronic device 100 is enabled to operate in a first mode (i.e., a normal mode). When the distance D between the portable electronic device 100 and the object is smaller than the predetermined distance D 1 , it is judged that the user did put the portable electronic device 100 near the ear (under a condition prone to erroneous touches) and the portable electronic device 100 is enabled to operate in a second mode different from the first mode.
- a first mode i.e., a normal mode
- the predetermined touch pressure threshold TP_TH of the touch panel 140 is adjusted to a first threshold TH 1 in the first mode
- the predetermined touch pressure threshold TP_TH of the touch panel 140 is adjusted to a second threshold TH 2 in the second mode, wherein the second threshold TH 2 is greater than the first threshold TH 1 . Since the predetermined touch pressure threshold TP_TH of the touch panel 140 is increased in the second mode (i.e., TH 2 >TH 1 ), the control module 170 will perform the touch function corresponding to the touch TU 1 only when the measured touch pressure value TP_M in the second mode is greater than the second threshold TH 2 . Accordingly, the condition of erroneously touching the touch panel can be avoided.
- the predetermined touch pressure threshold TP_TH of the touch panel 140 is not adjusted in the first mode, and the predetermined touch pressure threshold TP_TH of the touch panel 140 is adjusted to a threshold TH 3 in the second mode.
- the control module 170 will perform the touch function corresponding to the touch TU 1 only when the measured touch pressure value TP_M in the second mode is greater than the threshold TH 3 . Accordingly, the condition of erroneously touching the touch panel can be avoided.
- the touch panel 140 can be a resistive touch panel.
- FIG. 2 is a diagram showing an example of the touch panel 140 shown in FIG. 1 .
- the touch panel 140 comprises a display 210 , a first resistive plate 220 , and a second resistive plate 230 .
- the first resistive plate 220 and the second resistive plate 230 form a resistive touch screen.
- the display 210 can be an LCD display, but this should not be considered as limitations of the present invention.
- the first resistive plate 220 is parallel to the display 210 and the second resistive plate 230 is parallel to the first resistive plate 220 , wherein the second resistive plate 230 as well as the first resistive plate 220 is disposed on the same side of the display 210 .
- Each of the first resistive plate 220 and the second resistive plate 230 is a flexible transparent resistive layer.
- the first resistive plate 220 has conductive electrodes X+ and X ⁇ on the left and right edges thereof.
- the second resistive plate 230 has conductive electrodes Y+ and Y ⁇ on the upper and lower edges.
- the voltage at any point between the two electrodes should be proportional to the horizontal position of the first resistive plate 220 and the vertical position of the second resistive plate 230 .
- the touch TU 1 occurs on the display 210 , it will cause the first resistive plate 220 and the second resistive plate 230 in contact with each other.
- the position (including the X position and the Y position) of the touch TU 1 can be determined.
- a contact resistance R T caused by the touch TU 1 and formed between the first resistive plate 220 and the second resistive plate 230 can be measured to calculate the touch pressure value TP_M corresponding to the touch TU 1 .
- FIG. 3 (including 3 A, 3 B, 3 C, and 3 D) is an equivalent-circuit diagram illustrating how to measure a position and a contact resistance corresponding to the touch TU 1 on the touch panel 140 .
- X+ and X ⁇ respectively represents the electrodes X+ and X ⁇ of the first resistive plate 220 shown in FIG. 2
- Y+ and Y ⁇ respectively represents the electrodes Y+ and Y ⁇ of the second resistive plate 230 shown in FIG. 2
- R T represents the contact resistance formed between the first resistive plate 220 and the second resistive plate 230 .
- the two electrodes X+ and X ⁇ are connected to a power 310 .
- the voltage of the electrode Y+ is measured to obtain the X position.
- the two electrodes Y+ and Y ⁇ are connected to the power 310 .
- the voltage of the electrode X+ is measured to obtain the Y position.
- the two electrodes Y+ and X ⁇ are connected to the power 310 .
- the voltage of the electrode X+ is measured to obtain a value Z 1 .
- the two electrodes Y+ and X ⁇ are connected to the power 310 .
- the voltage of the electrode Y ⁇ is measured to obtain a value Z 2 .
- the X position represents the X coordinate of the touch TU 1 on the resistive touch screen
- the Y position represents the Y coordinate of the touch TU 1 on the resistive touch screen
- the values Z 1 and Z 2 represent the touch pressure value TP_M of the touch TU 1 .
- FIG. 4 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according an exemplary embodiment of the present invention. Please note that the following steps are not limited to be performed according to the exact sequence shown in FIG. 4 if a roughly identical result can be obtained.
- the method includes the following steps:
- Step 402 Start.
- Step 404 Determine whether a triggering event is received. When the triggering event is received, go to Step 406 ; otherwise, repeat Step 404 .
- Step 406 Enable a sensor to detect a distance D between the portable electronic device and an object. Afterwards, go to Step 408 .
- Step 408 Determine whether the distance D between the portable electronic device and the object is smaller than a predetermined distance D 1 .
- Step 410 When the distance D between the portable electronic device and the object is not smaller than the predetermined distance D 1 , go to Step 410 ; otherwise, go to Step 420 .
- Step 410 Enable the portable electronic device to operate in a first mode, and adjust the predetermined touch pressure threshold to a first threshold TH 1 . Afterwards, go to Step 430 .
- Step 420 Enable the portable electronic device to operate in a second mode, and adjust the predetermined touch pressure threshold to a second threshold TH 2 . Afterwards, go to Step 430 .
- Step 430 Measure a touch pressure value TP_M corresponding to a touch. Afterwards, go to Step 432 .
- Step 432 Determine whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold. When the touch pressure value is greater than the predetermined touch pressure threshold, go to Step 434 ; otherwise, go to Step 436 .
- Step 434 Perform a touch function corresponding to the touch.
- Step 436 Skip the step of performing the touch function corresponding to the touch.
- the triggering event determining module 110 determines whether the triggering event TE, such as a phone call or a wake-up notice, is received. When the triggering event TE is received, it transmits the start signal SS to enable the sensor 120 (Step 406 ); and when the triggering event TE is not received, the triggering event determining module 110 continues determining whether the triggering event TE is received.
- the triggering event TE such as a phone call or a wake-up notice
- the sensor 120 determines whether the distance D between the portable electronic device 100 and the object is smaller than the predetermined distance D 1 (Step 408 ), and then the touch pressure threshold setting module 130 adjusts the predetermined touch pressure threshold TP_TH of the touch panel 140 based on the distance D between the portable electronic device 100 and the object.
- the touch pressure threshold setting module 130 adjusts the predetermined touch pressure threshold TP_TH to the first threshold TH 1 (Step 410 ); and when the distance D between the portable electronic device 100 and the object is smaller than the predetermined distance D 1 , the touch pressure threshold setting module 130 adjusts the predetermined touch pressure threshold TP_TH to the second threshold TH 2 (Step 420 ).
- the touch pressure measuring module 150 measures the touch pressure value TP_M corresponding to the touch TU 1 (Step 430 ) and the touch pressure determining module 160 then determines whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold TP_TH (Step 432 ).
- the control module 170 performs the touch function corresponding to the touch TU 1 (Step 434 ); and when the touch pressure value TP_M is not greater than the predetermined touch pressure threshold TP_TH, the control module 170 skips the step of performing the touch function corresponding to the touch TU 1 (Step 436 ).
- the predetermined touch pressure threshold TP_TH is adjusted to the first threshold TH 1 in the first mode, while it is adjusted to the second threshold TH 2 in the second mode wherein TH 2 is greater than TH 1 .
- the control module 170 performs the touch function corresponding to the touch TU 1 when the touch pressure value TP_M is greater than the first threshold TH 1 in the first mode.
- the control module 170 performs the touch function corresponding to the touch TU 1 only when the touch pressure value TP_M is greater than the second threshold TH 2 . Therefore, the condition of erroneously touching the touch panel can be avoided.
- FIG. 5 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according another exemplary embodiment of the present invention.
- the method includes, but is not limited to, the following steps:
- Step 402 Start.
- Step 404 Determine whether a triggering event is received. When the triggering event is received, go to Step 406 ; otherwise, repeat Step 404 .
- Step 406 Enable a sensor to detect a distance D between the portable electronic device and an object. Afterwards, go to Step 408 .
- Step 408 Determine whether the distance D between the portable electronic device and the object is smaller than a predetermined distance D 1 .
- Step 510 When the distance D between the portable electronic device and the object is not smaller than the predetermined distance D 1 , go to Step 510 ; otherwise, go to Step 520 .
- Step 510 Enable the portable electronic device to operate in a first mode, and skip the step of adjusting the predetermined touch pressure threshold. Afterwards, go to Step 430 .
- Step 520 Enable the portable electronic device to operate in a second mode, and adjust the predetermined touch pressure threshold to a threshold TH 3 . Afterwards, go to Step 430 .
- Step 430 Measure a touch pressure value corresponding to a touch. Afterwards, go to Step 432 .
- Step 432 Determine whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold. When the touch pressure value TP_M is greater than the predetermined touch pressure threshold, go to Step 434 ; otherwise, go to Step 436 .
- Step 434 Perform a touch function corresponding to the touch.
- Step 436 Skip the step of performing the touch function corresponding to the touch.
- the steps in FIG. 5 are similar to the steps in FIG. 4 , and the difference between them is that the steps 410 and 420 shown in FIG. 4 are replaced by the steps 510 and 520 shown in FIG. 5 .
- the predetermined touch pressure threshold TP_TH is adjusted to the first threshold TH 1 in the first mode while it is adjusted to the second threshold TH 2 in the second mode in FIG. 4 , wherein the second threshold TH 2 is greater than the first threshold TH 1 .
- the predetermined touch pressure threshold TP_TH is not adjusted in the first mode while it is adjusted to the threshold TH 3 in the second mode in FIG. 5 .
- the present invention provides a portable electronic device and a related method for avoiding an erroneous touch on its touch panel.
- a sensor to detect the distance between the portable electronic device and an object together with by adjusting the predetermined touch pressure threshold of the portable electronic device based on the detected distance
- the portable electronic device can have different predetermined touch pressure thresholds under different conditions. Therefore, since the predetermined touch pressure threshold is increased when the user answers an incoming call, the condition that erroneous touches happened resulted from the face approaching to the portable electronic device can be reduced.
- the predetermined touch pressure threshold is maintained at its default value or is not adjusted, so as to perform the touch function of the touch panel properly. Accordingly, by adopting the portable electronic device and the method disclosed in the present invention, the problem of persecuting users caused by erroneous touches can be reduced and thereby give the users more convenience.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
- User Interface Of Digital Computer (AREA)
- Telephone Function (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a portable electronic device and a related method for avoiding erroneous touches on its touch panel, and more particularly, to a portable electronic device and a related method for adjusting a predetermined touch pressure threshold of the touch panel by detecting a distance between the portable electronic device and an object.
- 2. Description of the Prior Art
- Since portable electronic products, such as PDAs, mobile phones, and PDA phones have become more and more prevalent in consumer electronics market, touch panels have been broadly applied to these products as a data communication interface. As to the mobile phone, the users may erroneously touch the touch panel since their faces are too close to the touch panel when making or answering a phone call, which often persecutes the users. If the mobile phone is equipped with a capacity of determining when the users do want to perform the touch functions and when the users do not want to perform the touch functions, the problems of persecuting the users caused by erroneous touches can be reduced and thereby bring the users more convenience.
- It is one of the objectives of the present disclosure to provide a portable electronic device and a related method for avoiding an erroneous touch on its touch panel to solve the abovementioned problems.
- The present disclosure provides a method for avoiding an erroneous touch on a touch panel in a portable electronic device. The method includes the steps of determining whether a triggering event is received; enabling a sensor when the triggering event is received; detecting a distance between the portable electronic device and an object by the sensor; and determining the predetermined touch pressure threshold of the touch panel according to the detected distance between the portable electronic device and the object.
- In one embodiment, the predetermined touch pressure threshold is adjusted to a first threshold when the detected distance between the portable electronic device and the object is not smaller than the predetermined distance; and the predetermined touch pressure threshold is adjusted to a second threshold when the detected distance between the portable electronic device and the object is smaller than the predetermined distance.
- In another embodiment, the portable electronic device is enabled to operate in a first mode and the predetermined touch pressure threshold is not adjusted when the detected distance between the portable electronic device and the object is not smaller than the predetermined distance; and the portable electronic device is enabled to operate in a second mode and the predetermined touch pressure threshold is adjusted to a second threshold when the detected distance between the portable electronic device and the object is smaller than the predetermined distance.
- The present disclosure provides a portable electronic device. The portable electronic device comprises a touch panel, a sensor, a triggering event determining module, and a touch pressure threshold setting module. The touch panel has a predetermined touch pressure threshold. The sensor detects a distance between the portable electronic device and an object. The triggering event determining module determines whether a triggering event is received, and enables the sensor when the triggering event is received. The touch pressure threshold setting module determines the predetermined touch pressure threshold of the touch panel according to the distance detected by the sensor.
- These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
-
FIG. 1 is a diagram of a portable electronic device according to an embodiment of the present invention. -
FIG. 2 is a diagram showing an example of the touch panel shown inFIG. 1 . -
FIG. 3 (including 3A, 3B, 3C, and 3D) is an equivalent-circuit diagram illustrating how to measure a position and a contact resistance corresponding to a touch on a touch panel. -
FIG. 4 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according an exemplary embodiment of the present invention. -
FIG. 5 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according another exemplary embodiment of the present invention. - Please refer to
FIG. 1 .FIG. 1 is a diagram of a portableelectronic device 100 according to an embodiment of the present invention. As shown inFIG. 1 , the portableelectronic device 100 includes, but is not limited to, a triggeringevent determining module 110, asensor 120, a touch pressurethreshold setting module 130, atouch panel 140, a touchpressure measuring module 150, a touchpressure determining module 160, and acontrol module 170. Thetouch panel 140 has a predetermined touch pressure threshold TP_TH. The triggeringevent determining module 110 is configured to determine whether a triggering event TE is received and transmit a start signal SS to enable thesensor 120 when the triggering event TE is received. Thesensor 120 is configured to detect a distance D between the portableelectronic device 100 and an object, here the so-called object can be face, ear or any object approaching the portableelectronic device 100. In this embodiment, thesensor 120 can be any sensor capable of detecting the distance between the portableelectronic device 100 and an object or detecting whether the portableelectronic device 100 approaches an object, e.g. a proximity sensor or an ultrasonic distance sensor. The touch pressurethreshold setting module 130 is configured to determine the predetermined touch pressure threshold TP_TH of thetouch panel 140 according to the distance D between the portableelectronic device 100 and the object detected by thesensor 120. - Please keep referring to
FIG. 1 . The touchpressure measuring module 150 is configured to measure a touch pressure value TP_M corresponding to a touch TU1. The touchpressure determining module 160 is configured to determine whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold TP_TH to generate a determination result DR1. Thecontrol module 170 is configured to determine whether to perform a touch function corresponding to the touch TU1 according to the determination result DR1. - Please note that the portable
electronic device 100 can be a mobile phone or a PDA. But this should not be considered as limitations of the present invention, the portableelectronic device 100 can be a mobile device of other types. Furthermore, the triggering event TE can comprise a phone call or a wake-up notice, but the present invention is not limited to this only and can be other triggering events. - Please also note that, in order to solve the abovementioned problems of persecuting the users caused by erroneous touches on the touch panel in the prior art, the mechanism and the method disclosed in the present invention determines the predetermined touch pressure threshold TP_TH of the
touch panel 140 based on the distance D, which is detected by thesensor 120, between the portableelectronic device 100 and the object. For example, thesensor 120 can be utilized for determining whether the distance D between the portableelectronic device 100 and the object is smaller than a predetermined distance D1. When the distance D between the portableelectronic device 100 and the object is not smaller than the predetermined distance D1, it is judged that the user did not put the portableelectronic device 100 near the ear and the portableelectronic device 100 is enabled to operate in a first mode (i.e., a normal mode). When the distance D between the portableelectronic device 100 and the object is smaller than the predetermined distance D1, it is judged that the user did put the portableelectronic device 100 near the ear (under a condition prone to erroneous touches) and the portableelectronic device 100 is enabled to operate in a second mode different from the first mode. - In the following, several examples are taken for illustration. In a first example, the predetermined touch pressure threshold TP_TH of the
touch panel 140 is adjusted to a first threshold TH1 in the first mode, and the predetermined touch pressure threshold TP_TH of thetouch panel 140 is adjusted to a second threshold TH2 in the second mode, wherein the second threshold TH2 is greater than the first threshold TH1. Since the predetermined touch pressure threshold TP_TH of thetouch panel 140 is increased in the second mode (i.e., TH2>TH1), thecontrol module 170 will perform the touch function corresponding to the touch TU1 only when the measured touch pressure value TP_M in the second mode is greater than the second threshold TH2. Accordingly, the condition of erroneously touching the touch panel can be avoided. - In a second example, the predetermined touch pressure threshold TP_TH of the
touch panel 140 is not adjusted in the first mode, and the predetermined touch pressure threshold TP_TH of thetouch panel 140 is adjusted to a threshold TH3 in the second mode. Hence, it is not necessary to measure the touch pressure value TP_M in the first mode. Thecontrol module 170 will perform the touch function corresponding to the touch TU1 only when the measured touch pressure value TP_M in the second mode is greater than the threshold TH3. Accordingly, the condition of erroneously touching the touch panel can be avoided. - Please note that the
touch panel 140 can be a resistive touch panel. Please refer toFIG. 2 .FIG. 2 is a diagram showing an example of thetouch panel 140 shown inFIG. 1 . As shown inFIG. 2 , thetouch panel 140 comprises adisplay 210, a firstresistive plate 220, and a secondresistive plate 230. The firstresistive plate 220 and the secondresistive plate 230 form a resistive touch screen. Thedisplay 210 can be an LCD display, but this should not be considered as limitations of the present invention. The firstresistive plate 220 is parallel to thedisplay 210 and the secondresistive plate 230 is parallel to the firstresistive plate 220, wherein the secondresistive plate 230 as well as the firstresistive plate 220 is disposed on the same side of thedisplay 210. Each of the firstresistive plate 220 and the secondresistive plate 230 is a flexible transparent resistive layer. The firstresistive plate 220 has conductive electrodes X+ and X− on the left and right edges thereof. The secondresistive plate 230 has conductive electrodes Y+ and Y− on the upper and lower edges. If the firstresistive plate 220 and the secondresistive plate 230 have a consistent resistivity, the voltage at any point between the two electrodes should be proportional to the horizontal position of the firstresistive plate 220 and the vertical position of the secondresistive plate 230. When the touch TU1 occurs on thedisplay 210, it will cause the firstresistive plate 220 and the secondresistive plate 230 in contact with each other. By measuring the voltage caused by the touch TU1 and formed between the firstresistive plate 220 and the secondresistive plate 230, the position (including the X position and the Y position) of the touch TU1 can be determined. Moreover, a contact resistance RT caused by the touch TU1 and formed between the firstresistive plate 220 and the secondresistive plate 230 can be measured to calculate the touch pressure value TP_M corresponding to the touch TU1. - Please refer to
FIG. 3 andFIG. 2 .FIG. 3 (including 3A, 3B, 3C, and 3D) is an equivalent-circuit diagram illustrating how to measure a position and a contact resistance corresponding to the touch TU1 on thetouch panel 140. InFIG. 3 , X+ and X− respectively represents the electrodes X+ and X− of the firstresistive plate 220 shown inFIG. 2 , Y+ and Y− respectively represents the electrodes Y+ and Y− of the secondresistive plate 230 shown inFIG. 2 , and RT represents the contact resistance formed between the firstresistive plate 220 and the secondresistive plate 230. As shown in 3A, the two electrodes X+ and X− are connected to apower 310. At this time, the voltage of the electrode Y+ is measured to obtain the X position. As shown in 3B, the two electrodes Y+ and Y− are connected to thepower 310. At this time, the voltage of the electrode X+ is measured to obtain the Y position. As shown in 3C, the two electrodes Y+ and X− are connected to thepower 310. At this time, the voltage of the electrode X+ is measured to obtain a value Z1. As shown in 3D, the two electrodes Y+ and X− are connected to thepower 310. At this time, the voltage of the electrode Y− is measured to obtain a value Z2. The X position represents the X coordinate of the touch TU1 on the resistive touch screen, the Y position represents the Y coordinate of the touch TU1 on the resistive touch screen, and the values Z1 and Z2 represent the touch pressure value TP_M of the touch TU1. - Please refer to
FIG. 4 .FIG. 4 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according an exemplary embodiment of the present invention. Please note that the following steps are not limited to be performed according to the exact sequence shown inFIG. 4 if a roughly identical result can be obtained. The method includes the following steps: - Step 402: Start.
- Step 404: Determine whether a triggering event is received. When the triggering event is received, go to
Step 406; otherwise,repeat Step 404. - Step 406: Enable a sensor to detect a distance D between the portable electronic device and an object. Afterwards, go to
Step 408. - Step 408: Determine whether the distance D between the portable electronic device and the object is smaller than a predetermined distance D1. When the distance D between the portable electronic device and the object is not smaller than the predetermined distance D1, go to
Step 410; otherwise, go toStep 420. - Step 410: Enable the portable electronic device to operate in a first mode, and adjust the predetermined touch pressure threshold to a first threshold TH1. Afterwards, go to
Step 430. - Step 420: Enable the portable electronic device to operate in a second mode, and adjust the predetermined touch pressure threshold to a second threshold TH2. Afterwards, go to
Step 430. - Step 430: Measure a touch pressure value TP_M corresponding to a touch. Afterwards, go to
Step 432. - Step 432: Determine whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold. When the touch pressure value is greater than the predetermined touch pressure threshold, go to
Step 434; otherwise, go toStep 436. - Step 434: Perform a touch function corresponding to the touch.
- Step 436: Skip the step of performing the touch function corresponding to the touch.
- The following description details how each element operates by collocating the steps shown in
FIG. 4 and the elements shown inFIG. 1 . InStep 404, the triggeringevent determining module 110 determines whether the triggering event TE, such as a phone call or a wake-up notice, is received. When the triggering event TE is received, it transmits the start signal SS to enable the sensor 120 (Step 406); and when the triggering event TE is not received, the triggeringevent determining module 110 continues determining whether the triggering event TE is received. After thesensor 120 is enabled, thesensor 120 determines whether the distance D between the portableelectronic device 100 and the object is smaller than the predetermined distance D1 (Step 408), and then the touch pressurethreshold setting module 130 adjusts the predetermined touch pressure threshold TP_TH of thetouch panel 140 based on the distance D between the portableelectronic device 100 and the object. When the distance D between the portableelectronic device 100 and the object is not smaller than the predetermined distance D1, the touch pressurethreshold setting module 130 adjusts the predetermined touch pressure threshold TP_TH to the first threshold TH1 (Step 410); and when the distance D between the portableelectronic device 100 and the object is smaller than the predetermined distance D1, the touch pressurethreshold setting module 130 adjusts the predetermined touch pressure threshold TP_TH to the second threshold TH2 (Step 420). After that, when thetouch panel 140 receives the touch TU1, the touchpressure measuring module 150 measures the touch pressure value TP_M corresponding to the touch TU1 (Step 430) and the touchpressure determining module 160 then determines whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold TP_TH (Step 432). When the touch pressure value TP_M is greater than the predetermined touch pressure threshold TP_TH, thecontrol module 170 performs the touch function corresponding to the touch TU1 (Step 434); and when the touch pressure value TP_M is not greater than the predetermined touch pressure threshold TP_TH, thecontrol module 170 skips the step of performing the touch function corresponding to the touch TU1 (Step 436). In this embodiment, the predetermined touch pressure threshold TP_TH is adjusted to the first threshold TH1 in the first mode, while it is adjusted to the second threshold TH2 in the second mode wherein TH2 is greater than TH1. As a result, thecontrol module 170 performs the touch function corresponding to the touch TU1 when the touch pressure value TP_M is greater than the first threshold TH1 in the first mode. In the second mode, thecontrol module 170 performs the touch function corresponding to the touch TU1 only when the touch pressure value TP_M is greater than the second threshold TH2. Therefore, the condition of erroneously touching the touch panel can be avoided. - Please refer to
FIG. 5 .FIG. 5 is a flowchart illustrating a method for avoiding an erroneous touch on a touch panel in a portable electronic device according another exemplary embodiment of the present invention. The method includes, but is not limited to, the following steps: - Step 402: Start.
- Step 404: Determine whether a triggering event is received. When the triggering event is received, go to
Step 406; otherwise,repeat Step 404. - Step 406: Enable a sensor to detect a distance D between the portable electronic device and an object. Afterwards, go to
Step 408. - Step 408: Determine whether the distance D between the portable electronic device and the object is smaller than a predetermined distance D1. When the distance D between the portable electronic device and the object is not smaller than the predetermined distance D1, go to
Step 510; otherwise, go toStep 520. - Step 510: Enable the portable electronic device to operate in a first mode, and skip the step of adjusting the predetermined touch pressure threshold. Afterwards, go to
Step 430. - Step 520: Enable the portable electronic device to operate in a second mode, and adjust the predetermined touch pressure threshold to a threshold TH3. Afterwards, go to
Step 430. - Step 430: Measure a touch pressure value corresponding to a touch. Afterwards, go to
Step 432. - Step 432: Determine whether the touch pressure value TP_M is greater than the predetermined touch pressure threshold. When the touch pressure value TP_M is greater than the predetermined touch pressure threshold, go to
Step 434; otherwise, go toStep 436. - Step 434: Perform a touch function corresponding to the touch.
- Step 436: Skip the step of performing the touch function corresponding to the touch.
- Please note that the steps in
FIG. 5 are similar to the steps inFIG. 4 , and the difference between them is that thesteps FIG. 4 are replaced by thesteps FIG. 5 . In other words, the predetermined touch pressure threshold TP_TH is adjusted to the first threshold TH1 in the first mode while it is adjusted to the second threshold TH2 in the second mode inFIG. 4 , wherein the second threshold TH2 is greater than the first threshold TH1. On the other hand, the predetermined touch pressure threshold TP_TH is not adjusted in the first mode while it is adjusted to the threshold TH3 in the second mode inFIG. 5 . Although the approaches of these two embodiments are different from each other, both of them can achieve the goal of avoiding an erroneous touch on the touch panel. - Please note that, the steps of the abovementioned flowcharts are merely a practicable embodiment of the present invention, and in no way should be considered to be limitations of the scope of the present invention. The method can include other intermediate steps or can merge several steps into a single step without departing from the spirit of the present invention. Those skilled in the art should observe that various modifications of these methods may be made.
- The abovementioned embodiments are presented merely for describing the present invention, and in no way should be considered to be limitations of the scope of the present invention. In summary, the present invention provides a portable electronic device and a related method for avoiding an erroneous touch on its touch panel. By enabling a sensor to detect the distance between the portable electronic device and an object together with by adjusting the predetermined touch pressure threshold of the portable electronic device based on the detected distance, the portable electronic device can have different predetermined touch pressure thresholds under different conditions. Therefore, since the predetermined touch pressure threshold is increased when the user answers an incoming call, the condition that erroneous touches happened resulted from the face approaching to the portable electronic device can be reduced. Under a normal condition, the predetermined touch pressure threshold is maintained at its default value or is not adjusted, so as to perform the touch function of the touch panel properly. Accordingly, by adopting the portable electronic device and the method disclosed in the present invention, the problem of persecuting users caused by erroneous touches can be reduced and thereby give the users more convenience.
- Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.
Claims (20)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW098106141 | 2009-02-26 | ||
TW98106141A | 2009-02-26 | ||
TW098106141A TWI483145B (en) | 2009-02-26 | 2009-02-26 | Portable electronic device and method for avoiding erroneously touching touch panel thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100214258A1 true US20100214258A1 (en) | 2010-08-26 |
US8669962B2 US8669962B2 (en) | 2014-03-11 |
Family
ID=42630551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/626,626 Expired - Fee Related US8669962B2 (en) | 2009-02-26 | 2009-11-26 | Portable electronic device and method for avoiding erroneous touch on touch panel thereof |
Country Status (2)
Country | Link |
---|---|
US (1) | US8669962B2 (en) |
TW (1) | TWI483145B (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103067600A (en) * | 2013-01-14 | 2013-04-24 | 成都西可科技有限公司 | Error touching preventing system and implementation method of smart phone |
US20130135244A1 (en) * | 2011-11-29 | 2013-05-30 | Apple Inc | Embedded force measurement |
US20140184551A1 (en) * | 2012-06-06 | 2014-07-03 | Panasonic Corporation | Input device, input support method, and program |
US20150185909A1 (en) * | 2012-07-06 | 2015-07-02 | Freescale Semiconductor, Inc. | Method of sensing a user input to a capacitive touch sensor, a capacitive touch sensor controller, an input device and an apparatus |
JP2016009441A (en) * | 2014-06-26 | 2016-01-18 | 京セラ株式会社 | Mobile electronic device, control method and program therefor |
US20170031495A1 (en) * | 2015-07-31 | 2017-02-02 | Apple Inc. | Noise Adaptive Force Touch |
US9612680B2 (en) | 2015-01-28 | 2017-04-04 | Qualcomm Incorporated | Optimizing the use of sensors to improve pressure sensing |
CN110347541A (en) * | 2019-05-20 | 2019-10-18 | 珠海格力电器股份有限公司 | A kind of method of calibration, system and the terminal device of anti-error touch function |
US11256369B2 (en) * | 2020-03-13 | 2022-02-22 | Beijing Xiaomi Mobile Software Co., Ltd. | Method, device, and storage medium for preventing false touch of screen |
US11320936B2 (en) * | 2017-03-31 | 2022-05-03 | Sony Corporation | Input device, information processing device and information processing method for determining a pressing amount |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112013002288T5 (en) | 2012-05-03 | 2015-04-16 | Apple Inc. | Moment compensated bending beam sensor for load measurement on a bending beam supported platform |
TWI467420B (en) * | 2012-08-20 | 2015-01-01 | Asustek Comp Inc | Virtual mouse and operating method thereof |
WO2014098946A1 (en) | 2012-12-17 | 2014-06-26 | Changello Enterprise Llc | Force detection in touch devices using piezoelectric sensors |
US9836154B2 (en) | 2013-01-24 | 2017-12-05 | Nook Digital, Llc | Selective touch scan area and reporting techniques |
WO2014149023A1 (en) | 2013-03-15 | 2014-09-25 | Rinand Solutions Llc | Force sensing of inputs through strain analysis |
TWI496047B (en) * | 2013-03-19 | 2015-08-11 | Compal Electronics Inc | Touch apparatus and operating method thereof |
US10120478B2 (en) | 2013-10-28 | 2018-11-06 | Apple Inc. | Piezo based force sensing |
AU2015100011B4 (en) | 2014-01-13 | 2015-07-16 | Apple Inc. | Temperature compensating transparent force sensor |
US9612170B2 (en) | 2015-07-21 | 2017-04-04 | Apple Inc. | Transparent strain sensors in an electronic device |
US9874965B2 (en) | 2015-09-11 | 2018-01-23 | Apple Inc. | Transparent strain sensors in an electronic device |
US9886118B2 (en) | 2015-09-30 | 2018-02-06 | Apple Inc. | Transparent force sensitive structures in an electronic device |
US10006820B2 (en) | 2016-03-08 | 2018-06-26 | Apple Inc. | Magnetic interference avoidance in resistive sensors |
US10209830B2 (en) | 2016-03-31 | 2019-02-19 | Apple Inc. | Electronic device having direction-dependent strain elements |
US10133418B2 (en) | 2016-09-07 | 2018-11-20 | Apple Inc. | Force sensing in an electronic device using a single layer of strain-sensitive structures |
US10444091B2 (en) | 2017-04-11 | 2019-10-15 | Apple Inc. | Row column architecture for strain sensing |
US10309846B2 (en) | 2017-07-24 | 2019-06-04 | Apple Inc. | Magnetic field cancellation for strain sensors |
US10782818B2 (en) | 2018-08-29 | 2020-09-22 | Apple Inc. | Load cell array for detection of force input to an electronic device enclosure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060109252A1 (en) * | 2004-11-23 | 2006-05-25 | Microsoft Corporation | Reducing accidental touch-sensitive device activation |
US20070049358A1 (en) * | 2005-08-26 | 2007-03-01 | Lg Electronics Inc. | Mobile telecommunication handset having touch pad |
US20090009482A1 (en) * | 2007-05-01 | 2009-01-08 | Mcdermid William J | Touch sensor pad user input device |
US20110115742A1 (en) * | 2009-11-16 | 2011-05-19 | Broadcom Corporation | Touch sensitive panel detecting hovering finger |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8164573B2 (en) | 2003-11-26 | 2012-04-24 | Immersion Corporation | Systems and methods for adaptive interpretation of input from a touch-sensitive input device |
KR20070113025A (en) * | 2006-05-24 | 2007-11-28 | 엘지전자 주식회사 | Apparatus and operating method of touch screen |
TWI308285B (en) * | 2006-11-23 | 2009-04-01 | Inventec Corp | Notebook computer capable of preventing its touch panel from being touched accidentally |
TW200838266A (en) * | 2007-03-02 | 2008-09-16 | Inventec Corp | Locking method for touch screen and communication apparatus |
-
2009
- 2009-02-26 TW TW098106141A patent/TWI483145B/en not_active IP Right Cessation
- 2009-11-26 US US12/626,626 patent/US8669962B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060109252A1 (en) * | 2004-11-23 | 2006-05-25 | Microsoft Corporation | Reducing accidental touch-sensitive device activation |
US7847789B2 (en) * | 2004-11-23 | 2010-12-07 | Microsoft Corporation | Reducing accidental touch-sensitive device activation |
US20070049358A1 (en) * | 2005-08-26 | 2007-03-01 | Lg Electronics Inc. | Mobile telecommunication handset having touch pad |
US20090009482A1 (en) * | 2007-05-01 | 2009-01-08 | Mcdermid William J | Touch sensor pad user input device |
US20110115742A1 (en) * | 2009-11-16 | 2011-05-19 | Broadcom Corporation | Touch sensitive panel detecting hovering finger |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9746983B2 (en) | 2011-11-29 | 2017-08-29 | Apple Inc. | Embedded force measurement |
US20130135244A1 (en) * | 2011-11-29 | 2013-05-30 | Apple Inc | Embedded force measurement |
US8922523B2 (en) * | 2011-11-29 | 2014-12-30 | Apple Inc. | Embedded force measurement |
US10095366B2 (en) | 2011-11-29 | 2018-10-09 | Apple Inc. | Embedded force measurement |
US20140184551A1 (en) * | 2012-06-06 | 2014-07-03 | Panasonic Corporation | Input device, input support method, and program |
US9229573B2 (en) * | 2012-06-06 | 2016-01-05 | Panasonic Intellectual Property Corporation Of America | Input device, input support method, and program |
US20150185909A1 (en) * | 2012-07-06 | 2015-07-02 | Freescale Semiconductor, Inc. | Method of sensing a user input to a capacitive touch sensor, a capacitive touch sensor controller, an input device and an apparatus |
CN103067600A (en) * | 2013-01-14 | 2013-04-24 | 成都西可科技有限公司 | Error touching preventing system and implementation method of smart phone |
US20170097722A1 (en) * | 2014-06-26 | 2017-04-06 | Kyocera Corporation | Mobile electronic device, method of controlling mobile electronic device, and recording medium |
JP2016009441A (en) * | 2014-06-26 | 2016-01-18 | 京セラ株式会社 | Mobile electronic device, control method and program therefor |
US9612680B2 (en) | 2015-01-28 | 2017-04-04 | Qualcomm Incorporated | Optimizing the use of sensors to improve pressure sensing |
US20170031495A1 (en) * | 2015-07-31 | 2017-02-02 | Apple Inc. | Noise Adaptive Force Touch |
US10055048B2 (en) * | 2015-07-31 | 2018-08-21 | Apple Inc. | Noise adaptive force touch |
US11320936B2 (en) * | 2017-03-31 | 2022-05-03 | Sony Corporation | Input device, information processing device and information processing method for determining a pressing amount |
CN110347541A (en) * | 2019-05-20 | 2019-10-18 | 珠海格力电器股份有限公司 | A kind of method of calibration, system and the terminal device of anti-error touch function |
US11256369B2 (en) * | 2020-03-13 | 2022-02-22 | Beijing Xiaomi Mobile Software Co., Ltd. | Method, device, and storage medium for preventing false touch of screen |
Also Published As
Publication number | Publication date |
---|---|
TW201032100A (en) | 2010-09-01 |
US8669962B2 (en) | 2014-03-11 |
TWI483145B (en) | 2015-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8669962B2 (en) | Portable electronic device and method for avoiding erroneous touch on touch panel thereof | |
US8395594B2 (en) | Touch button false activation suppression | |
KR102425824B1 (en) | Haptic driving method and apparatus in flexible display | |
US9904404B2 (en) | Electronic device having touch sensor and driving method thereof | |
CN101727280B (en) | Method, system and mobile terminal for scaling pictures | |
US20100060609A1 (en) | Touched Position Detection Method for Touch Panel | |
TWI581139B (en) | Touch display device and control system thereof | |
US20120001859A1 (en) | Device and method for detecting noise | |
EP2284669B1 (en) | Touch panel and output method therefor | |
US20110248728A1 (en) | Electronic device and operation detection method | |
US20090109192A1 (en) | Touch Display Device and Method of Determining Touch Mode Thereof | |
WO2009098348A1 (en) | Method and device for operating a resistive touch input component as a proximity sensor | |
EP2653962A2 (en) | Receiving user input on a graphical user interface | |
CN101825964B (en) | Portable electronic device and method for preventing touch panel thereof from being touched by mistake | |
WO2008123546A1 (en) | Mobile information terminal device and mobile telephone | |
US20110248957A1 (en) | Mobile device having touch screen panel and method for managing the same | |
US9052741B2 (en) | Method in a mobile terminal for judging a contact between an operating member and touchpad | |
KR101442041B1 (en) | Electronic device and method for scanning a touch panel thereof | |
US20100283761A1 (en) | Panel module and detecting method | |
CN104881174A (en) | Method and device for dynamically adjusting sensitivity of touch screen | |
CN101424809B (en) | Touch control type lcd device | |
KR102299421B1 (en) | Touch panel display device, Active stylus pen and controlling method thereof | |
US20120212453A1 (en) | Sensor apparatus with different proximity sensors and sensing method thereof | |
US20210149520A1 (en) | Detection method for touch panel and touch panel | |
KR101090673B1 (en) | Method for displaying webpage, and computer readable record medium for the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HTC CORPORATION, TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KUAN, TSUNG-PAO;REEL/FRAME:023573/0368 Effective date: 20091124 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20220311 |